Graphene-based terahertz (THz)-field-induced optical luminescence (GB-TFIOL) is proposed in this Letter as a novel, to the best of our knowledge, THz imaging technique. We experimentally show that two-dimensional distribution of the optical luminescence from a monolayer graphene traces the beam profile of the pump THz radiation. The atomic thickness of a graphene detector, as well as a strong nonlinear dependence of optical luminescence on THz field, make the GB-TFIOL technique a useful tool for near-field mapping. A proof-of-principle experiment of the visualization of local THz-field enhancement near a metal tip with a 2 µm radius curvature was performed.

中文翻译：

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来自石墨烯的太赫兹场诱导的光学发光，用于太赫兹场的成像和近场可视化

据我们所知，本文提出了基于石墨烯的太赫兹 (THz) 场致发光 (GB-TFIOL) 作为一种新颖的太赫兹成像技术。我们通过实验表明，来自单层石墨烯的光学发光的二维分布追踪泵浦太赫兹辐射的光束轮廓。石墨烯探测器的原子厚度，以及光学发光对太赫兹场的强烈非线性依赖性，使 GB-TFIOL 技术成为近场映射的有用工具。对具有 2 µm 半径曲率的金属尖端附近的局部太赫兹场增强的可视化进行了原理验证实验。